1.\" Copyright (c) 1983, 1991 Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)psignal.3 6.2 (Berkeley) 4/19/91 33.\" $Id: psignal.3,v 1.4 1993/09/08 18:43:20 jtc Exp $ 34.\" 35.Dd April 19, 1991 36.Dt PSIGNAL 3 37.Os BSD 4.2 38.Sh NAME 39.Nm psignal , 40.Nm sys_siglist , 41.Nm sys_signame 42.Nd system signal messages 43.Sh SYNOPSIS 44.Fd #include <sys/signal.h> 45.Ft void 46.Fn psignal "unsigned sig" "const char *s" 47.Vt extern char *sys_siglist[]; 48.Vt extern char *sys_signame[]; 49.Sh DESCRIPTION 50The 51.Fn psignal 52function locates the descriptive message 53string for the given signal 54.Fa sig 55number 56and writes it to the 57.Em stderr . 58.Pp 59If the argument 60.Fa s 61is 62.Pf non- Dv NULL 63it is written to the 64.Em stderr 65prior to the message string. 66The signal number should be from among those found in 67.Aq Pa signal.h . 68.Pp 69The message strings can be accessed directly using the external array 70.Va sys_siglist , 71indexed by recognized signal numbers. The external array 72.Va sys_signame 73is used similarly and contains short, upper-case abbreviations for signals 74which are useful for recognizing signal names in user input. The defined 75variable 76.Dv NSIG 77contains a count of the strings in 78.Va sys_siglist 79and 80.Va sys_signame . 81.Sh SEE ALSO 82.Xr sigaction 2 , 83.Xr perror 3 84.Sh HISTORY 85The 86.Fn psignal 87function appeared in 88.Bx 4.2 . 89